25556317 has 2 divisors, whose sum is σ = 25556318. Its totient is φ = 25556316.

The previous prime is 25556309. The next prime is 25556329. The reversal of 25556317 is 71365552.

25556317 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19175641 + 6380676 = 4379^2 + 2526^2 .

It is a cyclic number.

It is not a de Polignac number, because 25556317 - 2³ = 25556309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25556347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12778158 + 12778159.

It is an arithmetic number, because the mean of its divisors is an integer number (12778159).

Almost surely, 2^25556317 is an apocalyptic number.

It is an amenable number.

25556317 is a deficient number, since it is larger than the sum of its proper divisors (1).

25556317 is an equidigital number, since it uses as much as digits as its factorization.

25556317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31500, while the sum is 34.

The square root of 25556317 is about 5055.3256077131. The cubic root of 25556317 is about 294.5547895060.

The spelling of 25556317 in words is "twenty-five million, five hundred fifty-six thousand, three hundred seventeen".